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spectrophotometry of bowen resonance fluorescence lines in three planetary nebulaeThe results are presented of a uniquely complete, carefully reduced set of observations of the O III Bowen fluorescence lines in the planetary nebulae NGC 6210, NGC 7027, and NGC 7662. A detailed comparison with the predictions of radiative excitation verify that some secondary lines are enhanced by selective population by the charge exchange mechanism involving O IV. Charge exchange is most important in NGC 6210, which is of significantly lower ionization than the other nebulae. In addition to the principal Bowen lines arising from Ly-alpha pumping of the O III O1 line, lines arising from pumping of the O3 line are also observed. Comparison of lines produced by O1 and O3 with the theoretical predictions of Neufeld indicate poor agreement; comparison with the theoretical predictions of Harrington show agreement with NGC 7027 and NGC 7662.
Document ID
19920052770
Document Type
Reprint (Version printed in journal)
Authors
O'Dell, C. R.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Miller, Christopher O.
(Rice University Houston, TX, United States)
Date Acquired
August 15, 2013
Publication Date
May 1, 1992
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 390
Issue: 1 Ma
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAG5-1626
CONTRACT_GRANT: NAS5-29451
Distribution Limits
Public
Copyright
Other